/*
 * Copyright (c) 2017, Oracle and/or its affiliates.
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 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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package com.oracle.truffle.llvm.parser.metadata;

public final class MDLocation implements MDBaseNode {

    private final long line;

    private final long column;

    private final MDReference inlinedAt;

    private final MDReference scope;

    private MDLocation(long line, long column, MDReference inlinedAt, MDReference scope) {
        this.line = line;
        this.column = column;
        this.inlinedAt = inlinedAt;
        this.scope = scope;
    }

    public long getLine() {
        return line;
    }

    public long getColumn() {
        return column;
    }

    public MDReference getInlinedAt() {
        return inlinedAt;
    }

    public MDReference getScope() {
        return scope;
    }

    @Override
    public String toString() {
        return String.format("Location (line=%d, column=%d, inlinedAt=%s, scope=%s)", line, column, inlinedAt, scope);
    }

    @Override
    public void accept(MetadataVisitor visitor) {
        visitor.visit(this);
    }

    private static final int MDNODE_LINE = 1;
    private static final int MDNODE_COLUMN = 2;
    private static final int MDNODE_SCOPE = 3;
    private static final int MDNODE_INLINEDAT = 4;

    public static MDLocation create38(long[] args, MetadataList md) {
        // [distinct, line, col, scope, inlined-at?]
        final long line = args[MDNODE_LINE];
        final long column = args[MDNODE_COLUMN];
        final MDReference scope = md.getMDRef(args[MDNODE_SCOPE]);
        final MDReference inlinedAt = md.getMDRefOrNullRef(args[MDNODE_INLINEDAT] - 1);
        return new MDLocation(line, column, inlinedAt, scope);
    }

    private static final int ARG_LINE = 0;
    private static final int ARG_COL = 1;
    private static final int ARG_SCOPE = 2;
    private static final int ARG_INLINEDAT = 3;

    public static MDLocation createFromFunctionArgs(long[] args, MetadataList md) {
        final long line = args[ARG_LINE];
        final long col = args[ARG_COL];
        final MDReference scope = md.getMDRefOrNullRef(args[ARG_SCOPE]);
        final MDReference inlinedAt = md.getMDRefOrNullRef(args[ARG_INLINEDAT]);
        return new MDLocation(line, col, inlinedAt, scope);
    }
}